office7 years ago000Can I use the Gigaset SL910H as an additional handset of Gigaset DX800A?Show in original language (German)menschmarcus7 years ago000Yes, it works, that's exactly why I bought it. Attention: you have to update the firmware of both devices to the same version so that the communication works. Instructions for this can be found on the Internet.Show in original language (German)Comment